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I think it’s pretty clear what this thread is about. You can say what driver you want (linear, buck, buck-boost, current requirements, diameter, input voltage range, maybe desired IC, etc…). I’m sure there are some good ideas out there that just need someone to develop a driver. I can try to build driver boards as well, but I can’t program them. Just tell what your driver of your dreams would be, but please stay realistic. Now let’s see what you have in mind.

This is a good idea. If we can get next gen firmware running on the latest MCU’s (the 1617 looks the most promising but not sure if they are able to be programmed yet) then we can have a few universal hardware and firmware options that should be able to cover almost everything.

Of course, when someone finds a very good IC that would work great with a driver, just post the datasheet. And if there is some interest, I can make a post briefly talking about different possibilities to “convert” regular buck drivers into LED drivers.

4×18650 series boost driver to power a XHP70.2 at 6000+ lumens with configurable brightness and number of modes from 1 to 7, ramp up, down, easy access to turbo and firefly, hidden SOS and blinkies, e-switch compatible with a find me led under the rubber button

OK
A driver with:
6V input (2S)
Output two independent 10A channels (controlled by own switch)
Fan connector that recieves power based on either or both output cmchannels (so when the two are at max, fan runs at max)

4×18650 series boost driver to power a XHP70.2 at 6000+ lumens with configurable brightness and number of modes from 1 to 7, ramp up, down, easy access to turbo and firefly, hidden SOS and blinkies, e-switch compatible with a find me led under the rubber button

4s boost driver for an xhp70? Are you thinking of a buck driver? Or a 4P boost driver maybe?

For e-switch lights, firmware will probably be relatively simple. I’ve been making a UI toolkit which abstracts out the hardware details, so pretty much any UI should be able to run on pretty much any hardware. When there’s new hardware, patch the toolkit to add support, and then every compatible UI should work with little or no changes.

Or that’s the idea, at least. So far I’ve only actually tried it on the D4 and Q8 drivers.

1. 1S Buck-Boost Driver for 2.8-4V LEDs which does up to 5A, but it configurable down to 3A. Controlled by eswitch with many low modes (like Zebralight), overtemp and overdischarge protection. Maybe also a version for clicky switches.

2. Buck driver with 7-8A for 3-4V LEDs and 2S-3s input. Should have all the usual features.

3. 30-50A Buck driver for 3-4V LEDs with flashlight compatible form (round, diameter not more than 50mm). Battery input should be 3-4S (with very low internal resistance). Must have overheating protection for driver and also LED. Must also have additional, small buck circuit for much lower modes. I know this one is rather difficult, but as long as it stays under 100$ and is actually useable it would be great. It would be used with Luminus CBT-140 and CFT-90 LEDs.

4. Boost Driver for 6V or 12V (preferably 6V) with 30W output, lots of low modes, eswitch, and all the other usual features.

Agreed, it would be foolish to input 4S and output 1S at 50A. There is no single LED that can handle that so you are better off running multiple LED’s in series. It makes things much simpler and more efficient.

Remember, voltage is easy, you pay no penalty for voltage other then needing to make sure your components can handle it (very easy up to around 30V).

On the other hand you pay BIG penalties for current. A 50A buck driver would be very difficult, I know as I am working on a driver that needs 30A and we ended up needing to split it into 2 separate 15A drivers to get the features we wanted.

I need a 17mm boost driver to run a Nichia 144A at around 3 Amperes from 1 cell.
It would be nice to have a boost driver like that with the option to set the current, like from 3 to 6 Amperes.
Optional e-switch would be nice too.

Agreed, it would be foolish to input 4S and output 1S at 50A. There is no single LED that can handle that so you are better off running multiple LED’s in series. It makes things much simpler and more efficient.

Remember, voltage is easy, you pay no penalty for voltage other then needing to make sure your components can handle it (very easy up to around 30V).

On the other hand you pay BIG penalties for current. A 50A buck driver would be very difficult, I know as I am working on a driver that needs 30A and we ended up needing to split it into 2 separate 15A drivers to get the features we wanted.

The Luminus LEDs which I mentioned are rated for a max of 28A. They will probably be able to take a bit more. So 30A is the absolute minimum here to make a driver interesting in this case!
The new Luminus CFT-90 is the one that is really interesting. It is much more efficient compared to older models. It is as bright as an XHP-70, but it’s factory de-domed and the DIE is only 9mm^2, the XHP-70(.2) should be around 14mm^2 when de-domed and 28mm^2 with dome). It also probably doesn’t have the 3D-Die of the Cree LEDs and will probably have a very high luminance (so very high throw with very high lumens). There is nothing on the market that matches it.

Please tell me more about your 30A project. You can PM me if you like.

Agreed, it would be foolish to input 4S and output 1S at 50A. There is no single LED that can handle that so you are better off running multiple LED’s in series. It makes things much simpler and more efficient.

Remember, voltage is easy, you pay no penalty for voltage other then needing to make sure your components can handle it (very easy up to around 30V).

On the other hand you pay BIG penalties for current. A 50A buck driver would be very difficult, I know as I am working on a driver that needs 30A and we ended up needing to split it into 2 separate 15A drivers to get the features we wanted.

The Luminus LEDs which I meantioned are rated for a max of 28A. They will probably be able to take a bit more. So 30A is the absolute minimum here to make a driver interesting in this case!
The new Luminus CFT-90 is the one that is really interesting. It is much more efficient compared to older models. It is as bright as an XHP-70, but it’s factory de-domed and the DIE is only 9mm^2, the XHP-70(.2) should be around 14mm^2 when de-domed and 28mm with dome). It also probably doesn’t have the 3D-Die of the Cree LEDs and will probably have a very high luminance (so very high throw with very high luminance). There is nothing on the market that matches it.

Please tell me more about your 30A project. You can PM me if you like.

quite pricy LED, but like 6000 OTF lumens from 9mm² might be possible, which would even beat a very hard driven XHP35

The Luminus LEDs which I meantioned are rated for a max of 28A. They will probably be able to take a bit more. So 30A is the absolute minimum here to make a driver interesting in this case!
The new Luminus CFT-90 is the one that is really interesting. It is much more efficient compared to older models. It is as bright as an XHP-70, but it’s factory de-domed and the DIE is only 9mm^2, the XHP-70(.2) should be around 14mm^2 when de-domed and 28mm with dome). It also probably doesn’t have the 3D-Die of the Cree LEDs and will probably have a very high luminance (so very high throw with very high luminance). There is nothing on the market that matches it.

Please tell me more about your 30A project. You can PM me if you like.

Interesting, never heard of the Luminus CFT-90. The last gen models were so inefficient I wrote them off. This latest version is still inefficient but it is not that far off of what we drive other LED’s to here.

Still going to be a tough job to make a buck driver for that, it will need to be quite large to fit the components needed, even a 46mm driver could not be big enough for everything depending on what components are used.

The project is kinda floating right now, not gonna say too much till I know if it is going forward or being dropped.

Basically it is a 6s6p input that needs to provide 18V at ~30A output to some LED’s.